# CVE-2021-35336: Missing authorization in n/a

> Unauthenticated attackers can access sensitive high-privileged areas of the Tieline IP Audio Gateway web interface due to incorrect access control.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jul 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gcr2-226m-p44h

## What is CVE-2021-35336?

CVE-2021-35336 is a critical missing authorization vulnerability in n/a, published on 1 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Tieline IP Audio Gateway 2.6.4.8 and below is affected by Incorrect Access Control. A vulnerability in the Tieline Web Administrative Interface could allow an unauthenticated user to access a sensitive part of the system with a high privileged account.

Weakness: CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2021-35336?

It affects 1 product.


Products: Tieline Ip Audtio Gateway Firmware.

## How do I fix CVE-2021-35336?

No fix has been published for CVE-2021-35336 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35336 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-35336 exists.

Public exploit code:

- Tieline IP Audio Gateway <=2.6.4.8 - Unauthorized Remote Admin Panel Access (nuclei): http/cves/2021/CVE-2021-35336.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35336 and fix it if it is affected.

What it is: CVE-2021-35336 is a critical missing authorization vulnerability in n/a, published on 1 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-35336 exists.

Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-35336/ (Markdown: https://insights.sbomify.com/CVE-2021-35336/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35336
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35336
- OSV: https://osv.dev/vulnerability/CVE-2021-35336

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-35336/
Summaries are generated and may contain mistakes; the official description above is the record.